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Integrate the Google Contacts custom data

This library provides extensions for custom data from the Google Contacts app; FileAs and UserDefined, which allows you to read and write Google Contacts data for all of your contacts. These (optional) extensions live in the customdata-googlecontacts module.

ℹ️ If you are looking to create your own custom data or get more insight on how the FileAs and UserDefined custom data was built, read Integrate custom data.

Register the Google Contacts custom data with the Contacts API instance

You may register all Google Contacts custom data when creating the Contacts API instance,

val contactsApi = Contacts(
    context,
    customDataRegistry = CustomDataRegistry().register(
        GoogleContactsRegistration()
    )
)

Or, alternatively after creating the Contacts API instance,

val contactsApi = Contacts(context)
GoogleContactsRegistration().registerTo(contactsApi.customDataRegistry)

Read/write Google Contacts custom data

Get/set FileAs

Just like regular data kinds, FileAs custom data belong to a RawContact. A RawContact may only have 0 or 1 FileAs.

To get the FileAs of a RawContact,

val fileAs = rawContact.fileAs(contactsApi)

To get the FileAs of all RawContacts belonging to a Contact,

val fileAsSequence = contact.fileAs(contactsApi)
val fileAsList = contact.fileAsList(contactsApi)

To set the FileAs of a (mutable) RawContact,

mutableRawContact.setFileAs(contacts, mutableFileAs)
// or
mutableRawContact.setFileAs(contacts) {
    name = "Robot"
}

To set the FileAs of the first RawContact in a Contact,

mutableContact.setFileAs(contacts, mutableFileAs)
// or
mutableContact.setFileAs(contacts) {
  name = "Robot"
}

Get/add/remove UserDefined

Just like regular data kinds, UserDefined custom data belong to a RawContact. A RawContact may have 0, 1, or more UserDefined.

To get the UserDefined list/sequence of a RawContact,

val userDefinedSequence = rawContact.userDefined(contactsApi)
val userDefinedList = rawContact.userDefinedList(contactsApi)

To get the UserDefined of all RawContacts belonging to a Contact,

val userDefinedSequence = contact.userDefined(contactsApi)
val userDefinedList = contact.userDefinedList(contactsApi)

To add a UserDefined to a (mutable) RawContact,

mutableRawContact.addUserDefined(contacts, mutableUserDefined)
// or
mutableRawContact.addUserDefined(contacts) {
    field = "My Field"
    label = "My Label"
}

To add a UserDefined to the first RawContact in a Contact,

mutableContact.addUserDefined(contacts, mutableUserDefined)
// or
mutableContact.addUserDefined(contacts) {
  field = "My Field"
  label = "My Label"
}

Use the Google Contacts custom data in queries, inserts, updates, and deletes

Once you have registered the Google Contacts custom data with the Contacts API instance, the API instance is now able to perform read and write operations on it.

Google Contacts app data integrity

When inserting or updating a UserDefined data kind, the Google Contacts app enforces UserDefined.field and UserDefined.label to both be non-null and non-blank. Otherwise, the insert or update operation fails. To protect the data integrity that the Google Contacts app imposes, this library is silently not performing insert or update operations for these instances. Consumers are informed via documentation.

Both field and label must be non-null and non-blank strings in order for insert and update operations to be performed on them. The corresponding fields must also be included in the insert or update operation. Otherwise, the update and insert operation will silently NOT be performed.

We might change the way we handle this in the future. Maybe we'll throw an exception instead or fail the entire insert/update and bubble up the reason. For now, to avoid complicating the API in these early stages, we'll go with silent but documented. We'll see what the community thinks!

Google Contacts app UI

In the Google Contacts app, the FileAs and UserDefined custom data are only shown for RawContacts that are associated with a Google Account. Local (device-only) RawContacts do not have these custom data!

ℹ️ For more info on local contacts, read about Local (device-only) contacts.

Syncing Google Contacts custom data

The Google Contacts app comes with sync adapters that is responsible for syncing FileAs and UserDefined custom data. As long as you have the Google Contacts app installed, these custom data should remain synced depending on account sync settings.

ℹ️ This library does not provide sync adapters for Google Contacts custom data.

For more info, read Sync contact data across devices.